<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .box {
            display: flex;
            justify-content: space-between;
            width: 600px;
            height: 600px;
            border: 1px solid #000;
            margin: 100px auto;
        }
        .box div {
            width: 100px;
            height: 100px;
            background-color: pink;
            border-radius: 50%;
        }
        .box div:nth-child(2) {
            align-self: center;
        }
        .box div:nth-child(3) {
            align-self: flex-end;
        }
    </style>
</head>
<body>
    <div class="box">
        <div></div>
        <div></div>
        <div></div>
    </div>
</body>
</html>